【摘要】 目的:探讨妊娠高血压综合征(PIH)致脑后部可逆性脑病综合征(PRES)的MRI表现。方法:回顾性分析9例临床诊断为PIH致PRES患者的MRI平扫及扩散加权扫描(DWI)表现。结果:9例PRES患者MRI均可见双侧顶枕区皮质及皮层下白质多发病灶,在T1WI上病灶呈等信号或略低信号,FLAIR及T2WI上呈高信号,6例DWI显示病灶呈等信号或低信号,扩散系数(ADC值)升高,3例病灶DWI上呈高信号,ADC值不变。治疗后随访MRI显示所有患者病灶逐渐减小、消失。结论:PIH妊娠晚期发生的PRES病好发于顶枕叶皮质及皮层下白质,治疗及时可逆转,采用MRI平扫及DWI成像结合临床特征,可做出较为明确诊断。更多还原

【Abstract】 Objective:To study the magnetic resonance imaging(MRI) features of posterior reversible encephalopathy syndrome(PRES) caused by pregnancy-induced hypertension(PIH).Methods:9 cases diagnosed as posterior reversible encephalopathy were examined by MRI scan and MRI scan+diffusion-weighted imaging(DWI).Results:The MRI images of 9 cases displayed bilaterally symmetrical distributions with iso-intensity or slightly low-intensity on T1WI and increased signal intensity on T2WI and FLAIR,some of the lesions with iso-intensity or slightly low-intensity on DWI and with high signals on ADC,also some lesions showed high signals on DWI and iso-intensity on ADC.MRI for follow-up showed complete or nearly complete absorption of lesions after adequate clinical treatment.Conclusion:Posterior reversible encephalopathy syndrome caused by pregnancy-induced hypertension is mostly located in the parieto-occipital cortex and the infracortical white matter.By integrating MRI scan and MRI scan+diffusion-weighted imaging with clinical characteristics,a clear diagnosis can be made,thus the posterior reversible encephalopathy syndrome caused by pregnancy-induced hypertension can be treated with good results.更多还原